Update RHCOS to OCP version map (#1895)

Co-authored-by: sebrandon1 <[email protected]>

cnf-certification-test/platform/operatingsystem/files/rhcos_version_map

@@ -202,6 +202,7 @@
 4.12.49 / 412.86.202402010350-0
 4.12.5 / 412.86.202302170236-0
 4.12.50 / 412.86.202402131748-0
+4.12.51 / 412.86.202402272018-0
 4.12.6 / 412.86.202302282003-0
 4.12.7 / 412.86.202303011010-0
 4.12.8 / 412.86.202303141242-0
@@ -274,6 +275,7 @@
 4.14.12 / 414.92.202402051952-0
 4.14.13 / 414.92.202402140225-0
 4.14.14 / 414.92.202402201520-0
+4.14.15 / 414.92.202402261929-0
 4.14.2 / 414.92.202311061957-0
 4.14.3 / 414.92.202311150705-0
 4.14.4 / 414.92.202311222314-0